All MIBs › CISCOSB-BRIDGE-SECURITY › rlIpArpInspectVlanNumOfArpMismatched
rlIpArpInspectVlanNumOfArpMismatched
Module: CISCOSB-BRIDGE-SECURITY
OID (symbolic): CISCOSB-BRIDGE-SECURITY::rlIpArpInspectVlanNumOfArpMismatched
OID (numeric): 1.3.6.1.4.1.9.6.1.101.112.3.6.1.6
Node type: OBJECT-TYPE
Type: Counter32
Access: read-only
Description: Number of dropped ARP packets, which were validated by ARP inspection and inconsistency was found for IP and MAC (mismatch)
What is rlIpArpInspectVlanNumOfArpMismatched?
This read-only Counter32 counts ARP packets dropped by ARP inspection specifically because an inconsistency was found between the claimed IP and MAC address on a given VLAN. An admin cares because this narrower counter isolates true suspected spoofing/mismatch events from other drop causes like an unrecognized but otherwise valid host. For example, an admin who sees this mismatch counter rising while the DHCP snooping bindings look normal would treat it as a likely active ARP spoofing attempt on that VLAN.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.9.6.1.101.112.3.6.1.6 snmpwalk -v2c -c public <target> CISCOSB-BRIDGE-SECURITY::rlIpArpInspectVlanNumOfArpMismatched
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.9.6.1.101.112.3.6.1.6.1 snmpget -v2c -c public <target> CISCOSB-BRIDGE-SECURITY::rlIpArpInspectVlanNumOfArpMismatched.1
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OID Breakdown
Upper-level ancestors (10 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.9 | cisco | CAT2600-MIB |
| 1.3.6.1.4.1.9.6 | otherEnterprises | CISCO-SMI |
| 1.3.6.1.4.1.9.6.1 | ciscoSB | CISCO-SMI |
| 1.3.6.1.4.1.9.6.1.101 | switch001 | CISCOSB-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.9.6.1.101.112 | rlBridgeSecurity | CISCOSB-BRIDGE-SECURITY |
| 1.3.6.1.4.1.9.6.1.101.112.3 | rlIpArpInspect | CISCOSB-BRIDGE-SECURITY |
| 1.3.6.1.4.1.9.6.1.101.112.3.6 | rlIpArpInspectEnableVlanTable | CISCOSB-BRIDGE-SECURITY |
| 1.3.6.1.4.1.9.6.1.101.112.3.6.1 | rlIpArpInspectEnableVlanEntry | CISCOSB-BRIDGE-SECURITY |
| 1.3.6.1.4.1.9.6.1.101.112.3.6.1.6 | rlIpArpInspectVlanNumOfArpMismatched | CISCOSB-BRIDGE-SECURITY |